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Ultrafiltration facilitates filter porosities between 500-500,000 Daltons. For clarification, 1 Dalton is 1 atomic mass unit. By employing serial filtrations using the ultrafiltration system submicron particles can be sequentially removed from aqueous samples to quantify their elemental contribution to the solution. This can assist in identifying the nature of system failures to understanding the fate and transport of contaminants